%cpu

[unix-history] / usr / src / sys / kern / kern_clock.c

diff --git a/usr/src/sys/kern/kern_clock.c b/usr/src/sys/kern/kern_clock.c
index 5b29708..84eef57 100644 (file)
--- a/usr/src/sys/kern/kern_clock.c
+++ b/usr/src/sys/kern/kern_clock.c
@@ -1,4 +1,4 @@
-/*     %H%     3.19    kern_clock.c    */
+/*     %H%     3.20    kern_clock.c    */

 
 #include "../h/param.h"
 #include "../h/systm.h"
 
 #include "../h/param.h"
 #include "../h/systm.h"


@@ -19,9 +19,13 @@
 
 #define        SCHMAG  9/10
 
 
 #define        SCHMAG  9/10
 

+/*
+ * Constant for decay filter for cpu usage.
+ */
+double ccpu = 0.93550698503161773774;          /* exp(-1/15) */

 
 /*
 
 /*

- * clock is called straight from
+ * Clock is called straight from

  * the real time clock interrupt.
  *
  * Functions:
  * the real time clock interrupt.
  *
  * Functions:


@@ -150,6 +154,7 @@ out:
        dk_time[cpstate][dk_busy&(DK_NSTATES-1)]++;
        if (!noproc) {
                pp = u.u_procp;
        dk_time[cpstate][dk_busy&(DK_NSTATES-1)]++;
        if (!noproc) {
                pp = u.u_procp;

+               pp->p_cpticks++;

                if(++pp->p_cpu == 0)
                        pp->p_cpu--;
                if(pp->p_cpu % 16 == 0) {
                if(++pp->p_cpu == 0)
                        pp->p_cpu--;
                if(pp->p_cpu % 16 == 0) {


@@ -206,10 +211,10 @@ out:
                        if(pp->p_stat==SSLEEP||pp->p_stat==SSTOP)
                                if (pp->p_slptime != 127)
                                        pp->p_slptime++;
                        if(pp->p_stat==SSLEEP||pp->p_stat==SSTOP)
                                if (pp->p_slptime != 127)
                                        pp->p_slptime++;

-                       if(pp->p_flag&SLOAD) {
-                               ave(pp->p_aveflt, pp->p_faults, 5);
-                               pp->p_faults = 0;
-                       }
+                       if (pp->p_flag&SLOAD)
+                               pp->p_pctcpu = ccpu * pp->p_pctcpu +
+                                   (1.0 - ccpu) * (pp->p_cpticks/(float)HZ);
+                       pp->p_cpticks = 0;

                        a = (pp->p_cpu & 0377)*SCHMAG + pp->p_nice - NZERO;
                        if(a < 0)
                                a = 0;
                        a = (pp->p_cpu & 0377)*SCHMAG + pp->p_nice - NZERO;
                        if(a < 0)
                                a = 0;